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| unit UBlowFish;
interface
uses SysUtils, Classes, Types;
type
PInt64 = ^Int64;
TDoubleDWORD = packed record
L, R: Cardinal;
end;
procedure GenerateSubkeys(const Key; const Length: Integer);
function EncryptedString(const Plaintext: string): string;
function DecryptedString(const Ciphertext: string): string;
implementation
{$R-,Q-}
type
TFourByte = packed record
B1, B2, B3, B4: Byte;
end;
TBlowfishSBox = array [0..255] of Cardinal;
TBlowfishPArray = array [0..17] of Cardinal;
var
FSBox1, FSBox2, FSBox3, FSBox4: TBlowfishSBox;
FPArray: TBlowfishPArray;
const
InitialSBox1: TBlowfishSBox = (
$d1310ba6, $98dfb5ac, $2ffd72db, $d01adfb7, $b8e1afed, $6a267e96,
$ba7c9045, $f12c7f99, $24a19947, $b3916cf7, $0801f2e2, $858efc16,
$636920d8, $71574e69, $a458fea3, $f4933d7e, $0d95748f, $728eb658,
$718bcd58, $82154aee, $7b54a41d, $c25a59b5, $9c30d539, $2af26013,
$c5d1b023, $286085f0, $ca417918, $b8db38ef, $8e79dcb0, $603a180e,
$6c9e0e8b, $b01e8a3e, $d71577c1, $bd314b27, $78af2fda, $55605c60,
$e65525f3, $aa55ab94, $57489862, $63e81440, $55ca396a, $2aab10b6,
$b4cc5c34, $1141e8ce, $a15486af, $7c72e993, $b3ee1411, $636fbc2a,
$2ba9c55d, $741831f6, $ce5c3e16, $9b87931e, $afd6ba33, $6c24cf5c,
$7a325381, $28958677, $3b8f4898, $6b4bb9af, $c4bfe81b, $66282193,
$61d809cc, $fb21a991, $487cac60, $5dec8032, $ef845d5d, $e98575b1,
$dc262302, $eb651b88, $23893e81, $d396acc5, $0f6d6ff3, $83f44239,
$2e0b4482, $a4842004, $69c8f04a, $9e1f9b5e, $21c66842, $f6e96c9a,
$670c9c61, $abd388f0, $6a51a0d2, $d8542f68, $960fa728, $ab5133a3,
$6eef0b6c, $137a3be4, $ba3bf050, $7efb2a98, $a1f1651d, $39af0176,
$66ca593e, $82430e88, $8cee8619, $456f9fb4, $7d84a5c3, $3b8b5ebe,
$e06f75d8, $85c12073, $401a449f, $56c16aa6, $4ed3aa62, $363f7706,
$1bfedf72, $429b023d, $37d0d724, $d00a1248, $db0fead3, $49f1c09b,
$075372c9, $80991b7b, $25d479d8, $f6e8def7, $e3fe501a, $b6794c3b,
$976ce0bd, $04c006ba, $c1a94fb6, $409f60c4, $5e5c9ec2, $196a2463,
$68fb6faf, $3e6c53b5, $1339b2eb, $3b52ec6f, $6dfc511f, $9b30952c,
$cc814544, $af5ebd09, $bee3d004, $de334afd, $660f2807, $192e4bb3,
$c0cba857, $45c8740f, $d20b5f39, $b9d3fbdb, $5579c0bd, $1a60320a,
$d6a100c6, $402c7279, $679f25fe, $fb1fa3cc, $8ea5e9f8, $db3222f8,
$3c7516df, $fd616b15, $2f501ec8, $ad0552ab, $323db5fa, $fd238760,
$53317b48, $3e00df82, $9e5c57bb, $ca6f8ca0, $1a87562e, $df1769db,
$d542a8f6, $287effc3, $ac6732c6, $8c4f5573, $695b27b0, $bbca58c8,
$e1ffa35d, $b8f011a0, $10fa3d98, $fd2183b8, $4afcb56c, $2dd1d35b,
$9a53e479, $b6f84565, $d28e49bc, $4bfb9790, $e1ddf2da, $a4cb7e33,
$62fb1341, $cee4c6e8, $ef20cada, $36774c01, $d07e9efe, $2bf11fb4,
$95dbda4d, $ae909198, $eaad8e71, $6b93d5a0, $d08ed1d0, $afc725e0,
$8e3c5b2f, $8e7594b7, $8ff6e2fb, $f2122b64, $8888b812, $900df01c,
$4fad5ea0, $688fc31c, $d1cff191, $b3a8c1ad, $2f2f2218, $be0e1777,
$ea752dfe, $8b021fa1, $e5a0cc0f, $b56f74e8, $18acf3d6, $ce89e299,
$b4a84fe0, $fd13e0b7, $7cc43b81, $d2ada8d9, $165fa266, $80957705,
$93cc7314, $211a1477, $e6ad2065, $77b5fa86, $c75442f5, $fb9d35cf,
$ebcdaf0c, $7b3e89a0, $d6411bd3, $ae1e7e49, $00250e2d, $2071b35e,
$226800bb, $57b8e0af, $2464369b, $f009b91e, $5563911d, $59dfa6aa,
$78c14389, $d95a537f, $207d5ba2, $02e5b9c5, $83260376, $6295cfa9,
$11c81968, $4e734a41, $b3472dca, $7b14a94a, $1b510052, $9a532915,
$d60f573f, $bc9bc6e4, $2b60a476, $81e67400, $08ba6fb5, $571be91f,
$f296ec6b, $2a0dd915, $b6636521, $e7b9f9b6, $ff34052e, $c5855664,
$53b02d5d, $a99f8fa1, $08ba4799, $6e85076a
);
InitialSBox2: TBlowfishSBox = (
$4b7a70e9, $b5b32944, $db75092e, $c4192623, $ad6ea6b0, $49a7df7d,
$9cee60b8, $8fedb266, $ecaa8c71, $699a17ff, $5664526c, $c2b19ee1,
$193602a5, $75094c29, $a0591340, $e4183a3e, $3f54989a, $5b429d65,
$6b8fe4d6, $99f73fd6, $a1d29c07, $efe830f5, $4d2d38e6, $f0255dc1,
$4cdd2086, $8470eb26, $6382e9c6, $021ecc5e, $09686b3f, $3ebaefc9,
$3c971814, $6b6a70a1, $687f3584, $52a0e286, $b79c5305, $aa500737,
$3e07841c, $7fdeae5c, $8e7d44ec, $5716f2b8, $b03ada37, $f0500c0d,
$f01c1f04, $0200b3ff, $ae0cf51a, $3cb574b2, $25837a58, $dc0921bd,
$d19113f9, $7ca92ff6, $94324773, $22f54701, $3ae5e581, $37c2dadc,
$c8b57634, $9af3dda7, $a9446146, $0fd0030e, $ecc8c73e, $a4751e41,
$e238cd99, $3bea0e2f, $3280bba1, $183eb331, $4e548b38, $4f6db908,
$6f420d03, $f60a04bf, $2cb81290, $24977c79, $5679b072, $bcaf89af,
$de9a771f, $d9930810, $b38bae12, $dccf3f2e, $5512721f, $2e6b7124,
$501adde6, $9f84cd87, $7a584718, $7408da17, $bc9f9abc, $e94b7d8c,
$ec7aec3a, $db851dfa, $63094366, $c464c3d2, $ef1c1847, $3215d908,
$dd433b37, $24c2ba16, $12a14d43, $2a65c451, $50940002, $133ae4dd,
$71dff89e, $10314e55, $81ac77d6, $5f11199b, $043556f1, $d7a3c76b,
$3c11183b, $5924a509, $f28fe6ed, $97f1fbfa, $9ebabf2c, $1e153c6e,
$86e34570, $eae96fb1, $860e5e0a, $5a3e2ab3, $771fe71c, $4e3d06fa,
$2965dcb9, $99e71d0f, $803e89d6, $5266c825, $2e4cc978, $9c10b36a,
$c6150eba, $94e2ea78, $a5fc3c53, $1e0a2df4, $f2f74ea7, $361d2b3d,
$1939260f, $19c27960, $5223a708, $f71312b6, $ebadfe6e, $eac31f66,
$e3bc4595, $a67bc883, $b17f37d1, $018cff28, $c332ddef, $be6c5aa5,
$65582185, $68ab9802, $eecea50f, $db2f953b, $2aef7dad, $5b6e2f84,
$1521b628, $29076170, $ecdd4775, $619f1510, $13cca830, $eb61bd96,
$0334fe1e, $aa0363cf, $b5735c90, $4c70a239, $d59e9e0b, $cbaade14,
$eecc86bc, $60622ca7, $9cab5cab, $b2f3846e, $648b1eaf, $19bdf0ca,
$a02369b9, $655abb50, $40685a32, $3c2ab4b3, $319ee9d5, $c021b8f7,
$9b540b19, $875fa099, $95f7997e, $623d7da8, $f837889a, $97e32d77,
$11ed935f, $16681281, $0e358829, $c7e61fd6, $96dedfa1, $7858ba99,
$57f584a5, $1b227263, $9b83c3ff, $1ac24696, $cdb30aeb, $532e3054,
$8fd948e4, $6dbc3128, $58ebf2ef, $34c6ffea, $fe28ed61, $ee7c3c73,
$5d4a14d9, $e864b7e3, $42105d14, $203e13e0, $45eee2b6, $a3aaabea,
$db6c4f15, $facb4fd0, $c742f442, $ef6abbb5, $654f3b1d, $41cd2105,
$d81e799e, $86854dc7, $e44b476a, $3d816250, $cf62a1f2, $5b8d2646,
$fc8883a0, $c1c7b6a3, $7f1524c3, $69cb7492, $47848a0b, $5692b285,
$095bbf00, $ad19489d, $1462b174, $23820e00, $58428d2a, $0c55f5ea,
$1dadf43e, $233f7061, $3372f092, $8d937e41, $d65fecf1, $6c223bdb,
$7cde3759, $cbee7460, $4085f2a7, $ce77326e, $a6078084, $19f8509e,
$e8efd855, $61d99735, $a969a7aa, $c50c06c2, $5a04abfc, $800bcadc,
$9e447a2e, $c3453484, $fdd56705, $0e1e9ec9, $db73dbd3, $105588cd,
$675fda79, $e3674340, $c5c43465, $713e38d8, $3d28f89e, $f16dff20,
$153e21e7, $8fb03d4a, $e6e39f2b, $db83adf7
);
InitialSBox3: TBlowfishSBox = (
$e93d5a68, $948140f7, $f64c261c, $94692934, $411520f7, $7602d4f7,
$bcf46b2e, $d4a20068, $d4082471, $3320f46a, $43b7d4b7, $500061af,
$1e39f62e, $97244546, $14214f74, $bf8b8840, $4d95fc1d, $96b591af,
$70f4ddd3, $66a02f45, $bfbc09ec, $03bd9785, $7fac6dd0, $31cb8504,
$96eb27b3, $55fd3941, $da2547e6, $abca0a9a, $28507825, $530429f4,
$0a2c86da, $e9b66dfb, $68dc1462, $d7486900, $680ec0a4, $27a18dee,
$4f3ffea2, $e887ad8c, $b58ce006, $7af4d6b6, $aace1e7c, $d3375fec,
$ce78a399, $406b2a42, $20fe9e35, $d9f385b9, $ee39d7ab, $3b124e8b,
$1dc9faf7, $4b6d1856, $26a36631, $eae397b2, $3a6efa74, $dd5b4332,
$6841e7f7, $ca7820fb, $fb0af54e, $d8feb397, $454056ac, $ba489527,
$55533a3a, $20838d87, $fe6ba9b7, $d096954b, $55a867bc, $a1159a58,
$cca92963, $99e1db33, $a62a4a56, $3f3125f9, $5ef47e1c, $9029317c,
$fdf8e802, $04272f70, $80bb155c, $05282ce3, $95c11548, $e4c66d22,
$48c1133f, $c70f86dc, $07f9c9ee, $41041f0f, $404779a4, $5d886e17,
$325f51eb, $d59bc0d1, $f2bcc18f, $41113564, $257b7834, $602a9c60,
$dff8e8a3, $1f636c1b, $0e12b4c2, $02e1329e, $af664fd1, $cad18115,
$6b2395e0, $333e92e1, $3b240b62, $eebeb922, $85b2a20e, $e6ba0d99,
$de720c8c, $2da2f728, $d0127845, $95b794fd, $647d0862, $e7ccf5f0,
$5449a36f, $877d48fa, $c39dfd27, $f33e8d1e, $0a476341, $992eff74,
$3a6f6eab, $f4f8fd37, $a812dc60, $a1ebddf8, $991be14c, $db6e6b0d,
$c67b5510, $6d672c37, $2765d43b, $dcd0e804, $f1290dc7, $cc00ffa3,
$b5390f92, $690fed0b, $667b9ffb, $cedb7d9c, $a091cf0b, $d9155ea3,
$bb132f88, $515bad24, $7b9479bf, $763bd6eb, $37392eb3, $cc115979,
$8026e297, $f42e312d, $6842ada7, $c66a2b3b, $12754ccc, $782ef11c,
$6a124237, $b79251e7, $06a1bbe6, $4bfb6350, $1a6b1018, $11caedfa,
$3d25bdd8, $e2e1c3c9, $44421659, $0a121386, $d90cec6e, $d5abea2a,
$64af674e, $da86a85f, $bebfe988, $64e4c3fe, $9dbc8057, $f0f7c086,
$60787bf8, $6003604d, $d1fd8346, $f6381fb0, $7745ae04, $d736fccc,
$83426b33, $f01eab71, $b0804187, $3c005e5f, $77a057be, $bde8ae24,
$55464299, $bf582e61, $4e58f48f, $f2ddfda2, $f474ef38, $8789bdc2,
$5366f9c3, $c8b38e74, $b475f255, $46fcd9b9, $7aeb2661, $8b1ddf84,
$846a0e79, $915f95e2, $466e598e, $20b45770, $8cd55591, $c902de4c,
$b90bace1, $bb8205d0, $11a86248, $7574a99e, $b77f19b6, $e0a9dc09,
$662d09a1, $c4324633, $e85a1f02, $09f0be8c, $4a99a025, $1d6efe10,
$1ab93d1d, $0ba5a4df, $a186f20f, $2868f169, $dcb7da83, $573906fe,
$a1e2ce9b, $4fcd7f52, $50115e01, $a70683fa, $a002b5c4, $0de6d027,
$9af88c27, $773f8641, $c3604c06, $61a806b5, $f0177a28, $c0f586e0,
$006058aa, $30dc7d62, $11e69ed7, $2338ea63, $53c2dd94, $c2c21634,
$bbcbee56, $90bcb6de, $ebfc7da1, $ce591d76, $6f05e409, $4b7c0188,
$39720a3d, $7c927c24, $86e3725f, $724d9db9, $1ac15bb4, $d39eb8fc,
$ed545578, $08fca5b5, $d83d7cd3, $4dad0fc4, $1e50ef5e, $b161e6f8,
$a28514d9, $6c51133c, $6fd5c7e7, $56e14ec4, $362abfce, $ddc6c837,
$d79a3234, $92638212, $670efa8e, $406000e0
);
InitialSBox4: TBlowfishSBox = (
$3a39ce37, $d3faf5cf, $abc27737, $5ac52d1b, $5cb0679e, $4fa33742,
$d3822740, $99bc9bbe, $d5118e9d, $bf0f7315, $d62d1c7e, $c700c47b,
$b78c1b6b, $21a19045, $b26eb1be, $6a366eb4, $5748ab2f, $bc946e79,
$c6a376d2, $6549c2c8, $530ff8ee, $468dde7d, $d5730a1d, $4cd04dc6,
$2939bbdb, $a9ba4650, $ac9526e8, $be5ee304, $a1fad5f0, $6a2d519a,
$63ef8ce2, $9a86ee22, $c089c2b8, $43242ef6, $a51e03aa, $9cf2d0a4,
$83c061ba, $9be96a4d, $8fe51550, $ba645bd6, $2826a2f9, $a73a3ae1,
$4ba99586, $ef5562e9, $c72fefd3, $f752f7da, $3f046f69, $77fa0a59,
$80e4a915, $87b08601, $9b09e6ad, $3b3ee593, $e990fd5a, $9e34d797,
$2cf0b7d9, $022b8b51, $96d5ac3a, $017da67d, $d1cf3ed6, $7c7d2d28,
$1f9f25cf, $adf2b89b, $5ad6b472, $5a88f54c, $e029ac71, $e019a5e6,
$47b0acfd, $ed93fa9b, $e8d3c48d, $283b57cc, $f8d56629, $79132e28,
$785f0191, $ed756055, $f7960e44, $e3d35e8c, $15056dd4, $88f46dba,
$03a16125, $0564f0bd, $c3eb9e15, $3c9057a2, $97271aec, $a93a072a,
$1b3f6d9b, $1e6321f5, $f59c66fb, $26dcf319, $7533d928, $b155fdf5,
$03563482, $8aba3cbb, $28517711, $c20ad9f8, $abcc5167, $ccad925f,
$4de81751, $3830dc8e, $379d5862, $9320f991, $ea7a90c2, $fb3e7bce,
$5121ce64, $774fbe32, $a8b6e37e, $c3293d46, $48de5369, $6413e680,
$a2ae0810, $dd6db224, $69852dfd, $09072166, $b39a460a, $6445c0dd,
$586cdecf, $1c20c8ae, $5bbef7dd, $1b588d40, $ccd2017f, $6bb4e3bb,
$dda26a7e, $3a59ff45, $3e350a44, $bcb4cdd5, $72eacea8, $fa6484bb,
$8d6612ae, $bf3c6f47, $d29be463, $542f5d9e, $aec2771b, $f64e6370,
$740e0d8d, $e75b1357, $f8721671, $af537d5d, $4040cb08, $4eb4e2cc,
$34d2466a, $0115af84, $e1b00428, $95983a1d, $06b89fb4, $ce6ea048,
$6f3f3b82, $3520ab82, $011a1d4b, $277227f8, $611560b1, $e7933fdc,
$bb3a792b, $344525bd, $a08839e1, $51ce794b, $2f32c9b7, $a01fbac9,
$e01cc87e, $bcc7d1f6, $cf0111c3, $a1e8aac7, $1a908749, $d44fbd9a,
$d0dadecb, $d50ada38, $0339c32a, $c6913667, $8df9317c, $e0b12b4f,
$f79e59b7, $43f5bb3a, $f2d519ff, $27d9459c, $bf97222c, $15e6fc2a,
$0f91fc71, $9b941525, $fae59361, $ceb69ceb, $c2a86459, $12baa8d1,
$b6c1075e, $e3056a0c, $10d25065, $cb03a442, $e0ec6e0e, $1698db3b,
$4c98a0be, $3278e964, $9f1f9532, $e0d392df, $d3a0342b, $8971f21e,
$1b0a7441, $4ba3348c, $c5be7120, $c37632d8, $df359f8d, $9b992f2e,
$e60b6f47, $0fe3f11d, $e54cda54, $1edad891, $ce6279cf, $cd3e7e6f,
$1618b166, $fd2c1d05, $848fd2c5, $f6fb2299, $f523f357, $a6327623,
$93a83531, $56cccd02, $acf08162, $5a75ebb5, $6e163697, $88d273cc,
$de966292, $81b949d0, $4c50901b, $71c65614, $e6c6c7bd, $327a140a,
$45e1d006, $c3f27b9a, $c9aa53fd, $62a80f00, $bb25bfe2, $35bdd2f6,
$71126905, $b2040222, $b6cbcf7c, $cd769c2b, $53113ec0, $1640e3d3,
$38abbd60, $2547adf0, $ba38209c, $f746ce76, $77afa1c5, $20756060,
$85cbfe4e, $8ae88dd8, $7aaaf9b0, $4cf9aa7e, $1948c25c, $02fb8a8c,
$01c36ae4, $d6ebe1f9, $90d4f869, $a65cdea0, $3f09252d, $c208e69f,
$b74e6132, $ce77e25b, $578fdfe3, $3ac372e6
);
InitialPArray: TBlowfishPArray = (
$243f6a88, $85a308d3, $13198a2e, $03707344, $a4093822, $299f31d0,
$082efa98, $ec4e6c89, $452821e6, $38d01377, $be5466cf, $34e90c6c,
$c0ac29b7, $c97c50dd, $3f84d5b5, $b5470917, $9216d5d9, $8979fb1b
);
function EncryptedBlock(const Plaintext: Int64): Int64;
var
L, R: Cardinal;
begin
L := TDoubleDWORD(Plaintext).L;
R := TDoubleDWORD(Plaintext).R;
L := L xor FPArray[0];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[1];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[2];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[3];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[4];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[5];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[6];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[7];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[8];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[9];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[10];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[11];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[12];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[13];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[14];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[15];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
TDoubleDWORD(Result).L := R xor FPArray[17];
TDoubleDWORD(Result).R := L xor FPArray[16];
end;
function DecryptedBlock(const Ciphertext: Int64): Int64;
var
L, R: Cardinal;
begin
L := TDoubleDWORD(Ciphertext).L;
R := TDoubleDWORD(Ciphertext).R;
L := L xor FPArray[17];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[16];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[15];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[14];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[13];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[12];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[11];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[10];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[9];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[8];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[7];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[6];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[5];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[4];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
L := L xor FPArray[3];
with TFourByte(L) do
R := R xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
R := R xor FPArray[2];
with TFourByte(R) do
L := L xor (FSBox1[B4] + FSBox2[B3] xor FSBox3[B2] + FSBox4[B1]);
TDoubleDWORD(Result).L := R xor FPArray[0];
TDoubleDWORD(Result).R := L xor FPArray[1];
end;
procedure GenerateSubkeys(const Key; const Length: Integer);
var
PKey: ^Byte;
I,J,K: Integer;
P: Int64;
Data: Cardinal;
begin
FSBox1:=InitialSBox1;
FSBox2:=InitialSBox2;
FSBox3:=InitialSBox3;
FSBox4:=InitialSBox4;
J := 0;
PKey := @(Key);
for I := 0 to 17 do begin
Data := 0;
for K := 1 to 4 do begin
Data := Data shl 8 or PKey^;
J := Succ(J) mod Length;
if J = 0 then
PKey := Addr(Key)
else
Inc(PKey);
end;
FPArray[I] := InitialPArray[I] xor Data;
end;
P := 0;
I := 0;
while I <= 17 do begin
P := EncryptedBlock(P);
FPArray[I] := TDoubleDWORD(P).L;
Inc(I);
FPArray[I] := TDoubleDWORD(P).R;
Inc(I);
end;
J := 0;
while J <= 255 do begin
P := EncryptedBlock(P);
FSBox1[J] := TDoubleDWORD(P).L;
Inc(J);
FSBox1[J] := TDoubleDWORD(P).R;
Inc(J);
end;
J := 0;
while J <= 255 do begin
P := EncryptedBlock(P);
FSBox2[J] := TDoubleDWORD(P).L;
Inc(J);
FSBox2[J] := TDoubleDWORD(P).R;
Inc(J);
end;
J := 0;
while J <= 255 do begin
P := EncryptedBlock(P);
FSBox3[J] := TDoubleDWORD(P).L;
Inc(J);
FSBox3[J] := TDoubleDWORD(P).R;
Inc(J);
end;
J := 0;
while J <= 255 do begin
P := EncryptedBlock(P);
FSBox4[J] := TDoubleDWORD(P).L;
Inc(J);
FSBox4[J] := TDoubleDWORD(P).R;
Inc(J);
end;
end;
function EncryptedString(const Plaintext: string): string;
var
PS, PD: PInt64;
Source: Int64;
i: Integer;
NumBlocks: Longint;
NumPadBytes: Byte;
begin
NumBlocks := Length(Plaintext) div 8;
NumPadBytes := 8 - Length(Plaintext) mod 8;
SetLength(Result, Succ(NumBlocks) * 8);
PS := Pointer(Plaintext);
PD := Pointer(Result);
for I := 1 to NumBlocks do begin
PD^ := EncryptedBlock(PS^);
Inc(PS);
Inc(PD);
end;
FillChar(Source, SizeOf(Source), NumPadBytes);
Move(PS^, Source, 8 - NumPadBytes);
PD^ := EncryptedBlock(Source);
end;
function DecryptedString(const Ciphertext: string): string;
var
Dest: Int64;
PS, PD: PInt64;
i: Integer;
NumCiphertextBytes: Longint;
NumPadBytes: Byte;
begin
NumCiphertextBytes:=Length(Ciphertext);
if (NumCiphertextBytes=0) or (NumCiphertextBytes mod SizeOf(Int64) <> 0) then
raise Exception.Create('Ciphertext is not a multiple of 8 bytes.');
PS := Pointer(Ciphertext);
Inc(PS, Pred(NumCiphertextBytes div 8));
Dest := DecryptedBlock(PS^);
NumPadBytes := TFourByte(TDoubleDWORD(Dest).R).B4;
SetLength(Result, NumCiphertextBytes - NumPadBytes);
Move(Dest, Result[NumCiphertextBytes - 8 + 1],
8 - NumPadBytes);
PS := Pointer(Ciphertext);
PD := Pointer(Result);
for I := 1 to Length(Result) div 8 do begin
PD^ := DecryptedBlock(PS^);
Inc(PS);
Inc(PD);
end;
end;
end. |
raziel: Topic aus Sonstiges verschoben am Di 04.10.2005 um 09:28